Elements: Oprofile Interface (2)


The interface to the module is in the form of /proc control inputs and device file outputs

/proc controls buffer sizes, sampling event and frequency setup, buffer flush command, and other information

Three device files (in /var) are used in a blocking-read loop to transfer data from kernel to user space
opdev: samples file
opnotedev: system call trace file
ophashmapdev: path hash table file to be memory mapped